Protective device for electrically-heated utensils.



J. F. LAMB. PROTECTIVE DEVICE FOEELBGTRIGALLY HEATED UTENSILS.

. APPLICATION FILED DIEO.13, 1912. 11,060,266.

' w TNESSES INVENTOR 4 4 Joseph E Lamb:

4 f BY A'ITORNEY Patented Apr. 29, 1913.

UN ED s-TATEs PATENT oFFIoE. 1

,JOSEPH F. LAMB, OI? NEW BRITAIN, CONNECTICUT, ASSIGNOR T LANDERS, FRARY&

CLARK, OF NEW BRITAIN, CONNECTICUT, A CORPORATION OF CONNECTICUT.

PROTECTIVE DEVICE Eon ELECTRICALLY-HEATED UTENSILS.

citizen of the United Be it known that I, Josnrn F. LAMB, a States, anda resident of New Britain, in the county of Hartford and State ofConnecticut,,have invented certain new and useful Improvements inIrotective Utensils, of which the following is a specification.

The object of the invention 18 to provide means for automaticallybreaking the circuit ofan electrical heater at a predeterminedtemperature,which is a little lower than a temperature which woulddestroy or injure the heater or the utensil, thus acting as a guard toprotect the device in case it is inadvertently left with the current onwhen it i is empty.

In the drawings which illustrate an embodiment of the invention Figure 1is a' side elevation partly in section, Fig. 2 is the bottom view of theheater.

In the drawings a denotes a receptacle, 6 its base, and c the completeheater; (5 and 6 represent the circuit wires, the Wire 6 being brokenand connected with the terminals 1, 10, which, as -seen, terminals'maybe conveniently mounted on a part of the heater and insulated therefrom,and, as shown, they project through insulating sleeves 2, l2, into atubular hub 13, which is threaded to receive a tubular I bushing 14,provided with an insulating lininlg 15 which supports a tube of lead 01'ot er suitable metal, which contacts with the spaced terminals 1, 10 andprovides an' electrical connection between them. If the utensil is emptyand the current left on, the heat will soon rise to a point where thelead sleeve willbe melted and the circuit between the terminals 1, 10,broken. As the lead melts it will run out through the tubular bushingand so keep the seat in the insulating lining free and clear. In orderto reestablish the circuit connections it is only necessary to removethe bushing 14, remove what is left of the lead connector and insertSpecificatioh of Letters Patent. Application filed December 13, 1912.

Devices for Electrically-Heated are spaced apart. These Patented Apr.2.), 1 913. Serial no. 736,526.

I claim as my invention:

1. The combination with an electrical heater, a pair of spaced terminalsconnected into the circuit of said heater, and a holder,

of 'a connector having a relatively low fusing point, formed separatelyfrom but clamped between said terminals and holder.

2. The combination with of material fusible at a relatively lowtemperature, and a holder formed at least in part of insulatingmaterial, engaging said connector to hold it in contact with theadjacent ends ,ofithe broken circuit. L

3. The combination with an electrical heater and a pair of spacedterminals connected into the circuitof said heater, of a tubular hubwithin which the ends of said terminals project, a bushing threaded intothe end of said hub, an insulating lining in said bushing, and aconnector of metal fusible at a relatively low temperature separatedfrom but supported by said insulating lining in contact-with saidterminals.

4. The combination with an electrical heater and a pair of spacedterminals con nected into the circuit of said heater, of a tubular hubwithin which the ends of said terminals project, a tubular bushingthread ed into the end of said hub, an insulating lining in saidbushing, and a tubular connector of metal fusible at-a relatively lowtemperature supported by said insulating a connector made lining incontact with said terminals.

5. The combination with an electrical heater and a pair of spacedtermlnals 'connected into the circuit of said heater, of a tubular hubwithin which the ends of said terminals project, a tubular bushingthreaded into the end of said hub, an insulating an electrical heaterhaving a n mally broken'circuit of lining located within the bushing andhavmg an inwardly inclined seat, and a tubular connector of metalfusible at a relatively low temperature supported-on the seat in theinsulating lining and held in contact with the terminals.

' 6. The combination with an electrical heater and a pair of spacedterminals connected into-the circuit of said heater, of a tubular hubdepending-from the underside of the heater and having alined aperturesthrough which said terminals pro ect, insulating linings inthejapertures, a connector made of metal having'a relatively low fusinector,

(rated in the recess in said holder, insulating 10 material interposedbetween the holder and connector, and means for supporting said holderto position and maintain said connector in contact- With said terminals.

ing point located within said hub in contact with said terminals, aholder for said connieans for supporting said holder in position, andinsulation interposed between the connector and the hub.

7. The combination with an electrical JOSEPH F. LAMB. heater and a pairof spaced terminals con- Witnesses: nected into the circuit of saidheater, of a C. H. DEMiNG,

in one end, a connector 10- O. N. J UDD.

holder recessed

